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A homology theory for spanning trees of a graph. (English) Zbl 0403.05040

MSC:
05C20 Directed graphs (digraphs), tournaments
05C05 Trees
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References:
[1] P. S. Alexandroff-H. Hopf,Topologie, Springer (Berlin, 1935).
[2] A. Frank,Combinatorial algorithms, algorithmic proofs. Doctoral dissertation (Budapest, 1975) (in Hungarian).
[3] E. Gyory, On division of graphs to connected subgraphs; to appear in theProceedings of the Fifth Hungarian Combinatorial Colloquium (Budapest, 1977).
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